水热法制备硅铁红包裹色料  

Study on the Preparation of Fe_2O_3-SiO_2 Red Inclusion Pigments

作　　者：陈云霞[1] 陈澄[1] 

机构地区：[1]景德镇陶瓷学院,景德镇333001

出　　处：《中国陶瓷》2016年第2期38-46,共9页China Ceramics

摘　　要：采用水热法制备了硅铁红色料。以氯化铁、正硅酸乙酯为原料按照一定配比配制溶液,通过氢氧化钠溶液调节溶液pH值,考察了SiO_2/Fe_2O_3配比、反应物浓度、矿化剂种类及添加量、水热反应温度、保温时间和填充度等参数对硅铁红色料晶型结构、呈色等的影响。在探索实验过程中得到较优配方,并通过单因素法对比不同条件下所得色料的色度值,结合其XRD衍射图谱分析各因素对实验结果的影响,从而改进实验配方,得到实验效果最佳的硅铁红色料。实验结果表明,当SiO_2/Fe_2O_3质量比为80/20、反应物Fe^(3+)浓度为0.015 M、添加0.12 g NaF,填充度65%,水热反应温度220℃、保温时间2 h得到呈色佳的硅铁红包裹色料,其色度值综合所有因素考虑是最佳的,为L*=41.72 a*=18.41 b*=7.84。Hematite-silica red pigment was prepared by hydrotherrnal method. Ferric chloride, TEOS solution was prepared as raw materials according to a certain proportion. Sodium hydroxide solution of 3 mol/L was used to adjust pH values of the hydrothermal solution. SiO2/Fe2O3 mass ratio, reactant concentration, the type and amount of mineralizing agent, hydrothermal treatment temperature, holding time and other parameters such as the filling materials, crystal structure of iron oxide all can impact the crystal structure and color presentation of the hydrothermally synthesized products. In the course of the experiment, the synthesizing conditions of hematite-silica red pigments were optimzed and the optimum fomulation and experiment conditions were obtained through comparing chromatic values under different conditions by single factor method, combined with the XRD analysis. The results revealed that the optimum pigment was synthesized under the conditions of SiO2/Fe2O3 mass ratio of 80/20, Fe3＋ reactant concentration of 0.015 mol/L, adding 0.12 g NaF, 65% fill factor, and the hydrothermal reaction temperature of 220 ℃ , holding time of 2 h. The as-synthesized hematite- silica red pigment was of L＊=41.72, a＊=18.41 and b＊=7.84.

关 键 词：水热法 硅铁红色料 包裹色料 

分 类 号：TQ174.45[化学工程—陶瓷工业]